Swiss authorities said a 17-year-old girl was pronounced dead early Wednesday due to injuries she sustained in a brutal attack on a train earlier this month.

The girl, identified in local media only as Melissa B., is reported to have had burns across 75 percent of her body. She died in a hospital sometime Tuesday night, police said.

The attacker, who died from his injuries a day after the August 19 incident, set a fire on the train and stabbed several passengers. Six other people were wounded by the assailant, though none of them are in critical condition.

The girl became the second to die from wounds sustained in the assault. The other victim, a 34 year-old mother reportedly from Croatia, died a day after the attack.

Police have ruled out terrorism as a motive in the attack, though they have not been able to offer any other explanation for the man’s actions.